private bool CheckNeighbor(MessageVersion1 message)
{
return neighbors.Contains(new Neighbor { Identifier = message.PeerId });
}
public void AddMessageToBuffer(MessageVersion1 message)
{
if (BufferedMessages == null)
BufferedMessages = new List<MessageVersion1>();
BufferedMessages.Add(message);
}
private IEnumerable<MessageVersion1> ApplyMessageBuffer(MessageVersion1 message, out Neighbor neighbor)
{
neighbor = null;
if (!CheckNeighbor(message)) return null;
neighbor = neighbors.Single(n => n.Identifier.Equals(message.PeerId));
if (message.PacketIndex <= neighbor.IncomingPacketIndex) return null;
if (message.PacketIndex > neighbor.IncomingPacketIndex + 1)
{
lock (neighbor)
neighbor.AddMessageToBuffer(message);
return null;
}
lock (neighbor)
if (neighbor.HasBufferedMessages)
{
neighbor.AddMessageToBuffer(message);
neighbor.IncomingPacketIndex += (ulong)neighbor.BufferedMessages.Count;
return neighbor.RemoveMessagesFromBuffer();
}
else
{
neighbor.IncomingPacketIndex++;
return new[] { message };
}
}
private bool VerifySignature(MessageVersion1 msgv1)
{
if (RsaKeyStore == null) return true;
var rsa = new RSACryptoServiceProvider
(RsaKeyStore.CspParameters ?? new CspParameters { Flags = CspProviderFlags.NoFlags });
if (RsaKeyStore.CspParameters == null)
rsa.ImportParameters(RsaKeyStore.RsaParameters);
var signature = new byte[128];
msgv1.Signature.CopyTo(signature, 0);
Array.Clear(msgv1.Signature, 0, 128);
var buffer = msgv1.Serialize();
return rsa.VerifyData(buffer, new SHA1CryptoServiceProvider(), signature);
}